#4C6366
Closest named color: Slate (#516572). oklch(48.2% 0.028 206.1), rgb(76, 99, 102).
Aa
White text reads best on this color (6.39:1).
About this color
#4C6366 is a medium-dark close to neutral grey. In OKLCH its lightness is 48%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.021 away. White text reads best on it, at 6.39:1.
| Hue family | Neutrals |
| Lightness | medium-dark (48%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.28:1 |
| White text | 6.39:1 |
Values
| HEX | #4C6366 |
| RGB | rgb(76, 99, 102) |
| HSL | hsl(187, 15%, 35%) |
| OKLCH | oklch(48.2% 0.028 206.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #4C6366 | 6.39:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #4C6366 | 3.28:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #4C6366 text on white | 6.39:1 | AA | Lc 81.8 | Fine for body text |
| #4C6366 text on black | 3.28:1 | AA large text | Lc -20.1 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EBEB
oklch(93.7% 0.004 197.1)
-
Step 200
200
#D4DBDB
oklch(88.6% 0.008 197)
-
Step 300
300
#B7C3C5
oklch(80.9% 0.014 208.8)
-
Step 400
400
#92A5A7
oklch(70.8% 0.022 204.4)
-
Step 500
500
#778F92
oklch(63.2% 0.028 205.7)
-
Step 600
600
#5F797C
oklch(55.7% 0.03 205)
-
Step 700
700 (this color)
#4C6366
oklch(48.2% 0.028 206.1)
-
Step 800
800
#405355
oklch(42.7% 0.024 204.3)
-
Step 900
900
#374446
oklch(37.6% 0.017 207.8)
-
Step 950
950
#202829
oklch(27% 0.011 205.8)
#4C6366 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #5F6166 | 0.027 |
| Deuteranopia (no green cones) | #5B5D66 | 0.027 |
| Tritanopia (no blue cones) | #446564 | 0.013 |
| Achromatopsia (no color) | #5F5F5F | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C6366
#4C6366
oklch(48.2% 0.028 206.1)
- #6D5856
#6D5856
oklch(48.1% 0.028 24.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #4C6366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.021
- Dim Gray #696969 ΔE 0.048
- YInMn Blue #415A77 ΔE 0.048
- Dusty Grape #545775 ΔE 0.051
- Dark Aqua #05696B ΔE 0.053
- Dark Green Blue #1F6357 ΔE 0.055
- Petrol #005F6A ΔE 0.062
- Deep Turquoise #017374 ΔE 0.062
Use #4C6366 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.